Gagliardo-Nirenberg and Caffarelli-Kohn-Nirenberg interpolation inequalities associated with Sobolev-Coulomb spaces

TL;DR

This paper extends and unifies Gagliardo-Nirenberg and Caffarelli-Kohn-Nirenberg inequalities for Sobolev-Coulomb spaces across the full fractional derivative range, leading to new Hardy-Lieb-Thirring inequalities for many-body quantum systems.

Contribution

It generalizes known inequalities to the full Sobolev-Coulomb scale and introduces new Hardy-Lieb-Thirring inequalities with strong repulsive interactions.

Findings

Extended inequalities to the full fractional Sobolev scale.

Derived new one-body Hardy-Lieb-Thirring inequalities.

Established many-body inequalities with strong repulsive interactions.

Abstract

We establish the full range Gagliardo-Nirenberg and the Caffarelli-Kohn-Nirenberg interpolation inequalities associated with Sobolev-Coulomb spaces for the (fractional) derivative $0 \leq s \leq 1$. As a result, we rediscover known Gaglairdo-Nirenberg interpolation type inequalities associated with Sobolev-Coulomb spaces which were previously established in the scale of $H^{s}$ with $0 < s \leq 1$ and extend them for the full range $W^{s, p}$ with $0\leq s \leq 1$ and $1 < p < + \infty$. Using these newly established weighted inequalities, we derive a new family of one body Hardy-Lieb-Thirring inequalities and use it to establish a new family of many body Hardy-Lieb-Thirring inequalities with a strong repulsive interaction term in $L^p$ scale.